21243276821068 has 48 divisors (see below), whose sum is σ = 38520619540480. Its totient is φ = 10240057713600.

The previous prime is 21243276821017. The next prime is 21243276821093. The reversal of 21243276821068 is 86012867234212.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35687005 + ... + 36277387.

Almost surely, 2^{21243276821068} is an apocalyptic number.

It is an amenable number.

21243276821068 is a deficient number, since it is larger than the sum of its proper divisors (17277342719412).

21243276821068 is a wasteful number, since it uses less digits than its factorization.

21243276821068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591518 (or 591516 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 52.

The spelling of 21243276821068 in words is "twenty-one trillion, two hundred forty-three billion, two hundred seventy-six million, eight hundred twenty-one thousand, sixty-eight".